{"product_id":"yokogawa-snt401-13-optical-esb-bus-repeater-master-module","title":"Yokogawa SNT401-13 Optical ESB Bus Repeater Master Module","description":"\u003ch2\u003eYokogawa SNT401-13 Optical ESB Bus Repeater Master Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for electrical-to-optical ESB bus signal conversion in ProSafe-RS and CENTUM VP\/CS 3000 system architectures, the \u003cstrong\u003eYokogawa SNT401-13\u003c\/strong\u003e (\u003cstrong\u003eSNT401-13\u003c\/strong\u003e Optical ESB Bus Repeater Master Module) provides direct physical\/electrical execution for ESB backbone extension across fiber-optic transmission segments.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNT401-13\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e-1\u003c\/strong\u003e: Standard type, no explosion protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-3\u003c\/strong\u003e: ISA G3 environmental resistance class, extended temperature rating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSNT401-13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.30 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperatingTemp\u003c\/td\u003e\n\u003ctd\u003e-20 degC to 70 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePowerConsumption\u003c\/td\u003e\n\u003ctd\u003eMax 0.5 A (system nest supplied)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eESB electrical-to-optical signal conversion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Type\u003c\/td\u003e\n\u003ctd\u003eESB Bus (Optical extension)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTopology\u003c\/td\u003e\n\u003ctd\u003eStar \/ Chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Cascading\u003c\/td\u003e\n\u003ctd\u003e2 stages\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003ctd\u003eFiber optic cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eProSafe-RS, CENTUM VP, CENTUM CS 3000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel-to-Channel Isolation \u0026amp; DCS Signal Integrity Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe SNT401-13 integrates into Yokogawa distributed control and safety architectures where ESB bus segmentation requires optical isolation between control nests. In DCS signal chain design, channel-to-channel isolation is structurally enforced through optical conversion, reducing conductive noise coupling across backplane-connected ESB segments. Within mixed 4-20 mA HART and fieldbus hybrid environments, the module maintains deterministic bus timing by decoupling electrical ground reference continuity between master and remote ESB domains. This architecture aligns with Yokogawa system-level design practices for long-distance node segmentation using fiber-based deterministic backplane extension.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the SNT401-13 support hot-swap replacement during system operation?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The module supports online replacement when installed within compatible Yokogawa ESB nests, provided system redundancy and node synchronization conditions are met.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum supported cascading depth?\u003c\/strong\u003e\u003cbr\u003eA: The module supports up to 2 optical conversion stages in a cascaded ESB extension architecture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is external power required for the optical conversion stage?\u003c\/strong\u003e\u003cbr\u003eA: No. Power is supplied through the system nest backplane, with a maximum consumption of 0.5 A.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall module only in designated ESB system nests compatible with SEC401\/SEC402 couplers.\u003c\/li\u003e\n\u003cli\u003eEnsure fiber optic cables are installed with minimum bend radius compliance to avoid attenuation increase.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between optical fiber routing and high-noise power conductors to prevent EMI coupling.\u003c\/li\u003e\n\u003cli\u003eVerify correct master-to-slave pairing (SNT401-13 to SNT501-13) before system energization.\u003c\/li\u003e\n\u003cli\u003eEnsure grounding of cabinet structure follows standard industrial control panel grounding practices to maintain signal reference stability.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":44175811543128,"sku":"SNT401-13","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/SNT401-13.jpg?v=1780455320","url":"https:\/\/www.industriaxplc.com\/products\/yokogawa-snt401-13-optical-esb-bus-repeater-master-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}